Geoege lenhardt



(No Model.)

G. LENHARDT.

PUMP

No. 316,631. Patented Apr. 28, 1885.

UNITED raras artnr Ormes.

GEORGE LENHARDT, OF DETROIT, MICHIGAN, ASSIGNOR OF FIVE-EIGHTHS 'TOSAMUEL G. KINNEY AND ALBERT E. PEPPERS, OF SAME PLACE.

WIP.

SPECIFICATION forming part of Letters Patent No. 316,631, dated April28, 1885.

Application led March 12. 1884. (No modell) To all whom it may concern:4

Beit known that I, GEORGE LENHARDT, of Detroit, in the county of Wayneand State of Michigan, have invented new and useful Improvements inPumps; and I hereby declare Ynon 0f Fig. 1. nig. 3 is a section ontherme x .r in Fig. 2. Fig. 4 is a cross-section on the line y y in Fig.2.

In the accompanying drawings,which form a part of this specification,Arepreseuts a suitable bed which supports my improved pump. B isapump-cylinder provided witha hub, O, the interior bore of which isconical to fit the conical portion a of the hollow trunnion D, which isprovided with a central division-wall, b, in the lower end of thecylinder B, and through the hub thereof are ports c and d, arranged withrelation to each other as shown in Fig. 4. Similar ports, e and f, areformed, as shown in Fig. 3, in the conical portion of the trunnion, oneon each side of the divisionwall b, with their major or longest diameterin line with the bore of the trunnion. The two chambers of the hollowtrunnion, being provided with means for coupling, form the eduction andinduction ports.

E is a pistou, which may be made in any of the known ways to tightly tthe cylinder B, in which it reeiprocates.v The upper end of this pistonor piston-rod is connected with a wrist-pin, F, secured to the crank Gupon the shaft H, which is supported by the standard I, and is driven bymeans ofthe crank-wheel J. lVhenthe cylinder stands in a verticalposition, the ports c d stand with relation to the ports e and f asshown in Figs. 3 and 4E,

valve, so that there is no communication between the interior of thecylinder and the induction and eduction ports. Now, by giving a rotarymotion to the wheel J a reciprocating which is communicated to thecylinder, causing the latter to oscillate upon its trunnion, and thisoscillation gradually brings the four small ports c d e f intoapposition gradually, so

the stroke these small ports are gradually opened or placed inapposition in like ratio, and in the other half of the stroke theirposition is gradually changed in the opposite dicrank-wheel these smallports are fully opened and fully closed. It will readily be seen that bymeans of this construction there are no valves employed, so that thepump may be is desired. It will also readily be seen that when thecrank-wheel is turned to the right the induction is from one side of themachine and the eduction from the other, and a change verses theoperation of these induction and eduction ports. It will also be noticedthat the trunnion is conical, and that the hub of the cylinder .iscorrespondingly bored and sleeved thereon with one end of the trunnionscrewed through the standard I, while the other end projects through thehub of the cylinder and is held in place by means of the nut d,by meansof which the hub can be adjusted or forced onto the trunnion as itbecomes worn.

I amaware of the patents to Velsh, No. 184,115 and Reissue No. 4,882,and. make no claim to anything shown therein. Nor do I claim, broadly, ahollow trunnion having a of said diaphragm, as that feature is shown inmy Patent No. 298,866. My present arrangel the trunnion D acting in thiscase as a cut-off 5o and oscillating motion is given to the piston,

that with the ingress of the speed on one half rection, so that in eachfull revolution of the used for almost any purposes for which a pump ofdirection of the crank-wheel to the left retransverse diaphragm andaport on each side 9o which is provided with a conically-bored huh,-

which has ports c d formed therein upon opposite sides of a centralcross-line of the cylinder, and upon opposite sides of a plane passedthrough its axial line of oscillation, in combination with a hollowtrunnion, conical upon a portion of its surface to engage with theconical bore of the hub, and in which there is a central cross-divisionWall,with the ports ef, one on each side of the Wall, each having itsmajor diameter in line with the bore ofthe trunnion, and arranged oneither side of said plane diagonally opposite to the ports c d,substantially as shown,and for the purposes specified.

2. The combination, in an oscillating pump, of the cylinder B, providedwith a hub, C, standard I, hollow trunnion D,having one end screwed intosaid standard and the other screwstructed, arranged, and operatingsubstan- 25 tially as and for the purposes described.

GEO. LENHARDT. Vitnesses:

H. S. SPRAGUE, E. J. SCULLY.

